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Preparation of a sub‐100 nm‐thick polyetherimide coating layer with nano‐TiO 2 particles on poly( p ‐phenylene benzobisoxazole) fiber surface
Author(s) -
Zhu Peng,
Liu Bing,
Bao Limin
Publication year - 2018
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.46852
Subject(s) - polyetherimide , materials science , fiber , x ray photoelectron spectroscopy , coating , scanning electron microscope , surface modification , composite material , contact angle , layer (electronics) , poly(p phenylene) , thermogravimetric analysis , evaporation , chemical engineering , nano , polymer , physics , engineering , thermodynamics
ABSTRACT To improve the UV resistance of poly( p ‐phenylene benzobisoxazole) (PBO) fibers, a sub‐100 nm‐thick coating layer was prepared on PBO fibers by evaporating the suspension of polyetherimide (PEI)‐encapsulated nano‐titanium dioxide (TiO 2 ) particles absorbed around the fiber surface. The effects of this evaporation‐induced surface modification on the structure and properties of PBO fibers were investigated. The content ratio of nano‐TiO 2 particles to PEI, the contents of nano‐TiO 2 particles and PEI, and the evaporation method greatly influenced the surface modification of the PBO fibers, as confirmed by scanning electron microscopy observation. TiO 2 , 3‐methacryloxypropyltrimethoxysilane, and PEI were confirmed to exist on the suitably treated PBO fiber surfaces by X‐ray photoelectron spectroscopy analysis. The PEI coating layer containing nano‐TiO 2 particles was clearly observed by transmission electron microscopy of a treated PBO fiber cross section. The nano‐TiO 2 particle content of the treated fibers was studied by thermogravimetric analysis. The UV resistance of the PBO fibers was improved after surface modification, which was confirmed by single‐fiber tensile strength test. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018 , 135 , 46852.